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United States Patent | 5,231,255 |
Reichensperger | July 27, 1993 |
The invention is an electric float switch with an electric connection cable whose sheath surrounds current-carrying electric conductors that are insulated relative to each other, and which is sealingly connected to the casing of said float switch, characterized in that a) the sheath of said prefabricated cable is made from a softly adjusted polypropylene prepared from a thermoplastic polypropylene granule mixture that is not cross-linked; b) and that said sheath is connected in one operation in an injection molding machine to said casing which accommodates said prefabricated float switch and consists of rigidly adjusted polypropylene, whereby a connecting component of rigidly adjusted polypropylene granule is formed.
Inventors: | Reichensperger; Gunter (Am Strebkamp 24, D-4800, Bielefeld, DE) |
Appl. No.: | 807268 |
Filed: | December 16, 1991 |
Dec 14, 1990[DE] | 4039939 |
Current U.S. Class: | 200/84R; 73/313; 174/77R; 428/217; 428/516 |
Intern'l Class: | H01H 035/18 |
Field of Search: | 428/217,516 307/118 174/76,74 R 200/84 R,84 A,84 B,84 C 340/623,624 73/308,313,318,321 |
4560598 | Dec., 1985 | Cowan | 428/516. |
4567069 | Jan., 1986 | Jabarin | 428/516. |
4692576 | Sep., 1987 | Frede | 200/84. |
4878969 | Nov., 1989 | Janisch | 428/217. |
4888989 | Dec., 1989 | Homer | 73/304. |
5089676 | Feb., 1992 | Duncan | 200/84. |